Fused piperidinyl bicyclic and related compounds as modulators of C5a receptor

Abstract

The present invention relates to fused piperidinyl bicyclic, meta-substituted piperidinyl and their related compounds that modulate activities of mammalian C5a receptor by directly binding to the C5a receptor. The invention also relates to pharmaceutical compositions containing such compounds and their use in the treatment of a disease or a disorder involving pathogenic activation of C5a receptors.

The invention claimed is: 
     
       1. A compound having the general formula (XXI) 
       
         
           
           
               
               
           
         
       
       and pharmaceutically acceptable salts, hydrates and rotamers thereof; 
       wherein
 C 1  is selected from the group consisting of aryl and heteroaryl, wherein the heteroaryl group has from 1-3 heteroatoms as ring members selected from N, O and S; and wherein said aryl and heteroaryl groups are optionally substituted with from 1 to 3 R 1  substituents; 
 C 2  is selected from the group consisting of aryl and heteroaryl, wherein the heteroaryl group has from 1-3 heteroatoms as ring members selected from N, O and S; and wherein said aryl and heteroaryl groups are optionally substituted with from 1 to 3 R 2  substituents; 
 C 3  is selected from the group consisting of C 1-8  alkyl or heteroalkyl, C 3-8  cycloalkyl, C 3-8  cycloalkyl-C 1-4  alkyl, aryl, aryl-C 1-4  alkyl, heteroaryl, heteroaryl-C 1-4  alkyl, heterocycloalkyl or heterocycloalkyl-C 1-4  alkyl, wherein the heteroalkyl group has from 1-3 heteroatoms selected from N, O and S, wherein the heterocycloalkyl group or portion has from 1-3 heteroatoms selected from N, O and S, and wherein the heteroaryl group has from 1-3 heteroatoms as ring members selected from N and S, and each C 3  is optionally substituted with from 1 to 3 R 3  substituents; 
 each R 1  is independently selected from the group consisting of halogen, —CN, —CO 2 R a , —CONR a R b , —C(O)R a , —OC(O)NR a R b , —NR b C(O)R a , —NR b C(O) 2 R c , —NR a —C(O)NR a R b , —NR a C(O)NR a R b , —NR a R b , —OR a , and —S(O) 2 NR a R b ; wherein each R a  and R b  is independently selected from hydrogen, C 1-8  alkyl, and C 1-8  haloalkyl, or when attached to the same nitrogen atom can be combined with the nitrogen atom to form a five or six-membered ring having from 0 to 2 additional heteroatoms as ring members selected from N, O or S, and is optionally substituted with one or two oxo; each R e  is independently selected from the group consisting of C 1-8  alkyl or heteroalkyl, C 1-8  haloalkyl, C 3-6  cycloalkyl, heterocycloalkyl, aryl and heteroaryl, and wherein the aliphatic and/or cyclic portions of R a , R b  and R c  are optionally further substituted with from one to three halogen, hydroxy, methyl, amino, alkylamino and dialkylamino groups; and
 optionally when two R 1  substituents are on adjacent atoms, are combined to form a fused five or six-membered carbocyclic or heterocyclic ring; 
 
 each R 2  is independently selected from the group consisting of halogen, —CN, —NO 2 , —R f , —CO 2 R d , —CONR d R e , —C(O)R d , —OC(O)NR d R e , —NR e C(O)R d , —NR e C(O) 2 R f , —NR d c(O)NR d R e , —NR d R e , —OR d , and —S(O) 2 NR d R e ; wherein each R d  and R e  is independently selected from hydrogen, C 1-8  alkyl, and C 1-8  haloalkyl, or when attached to the same nitrogen atom can be combined with the nitrogen atom to form a five or six-membered ring having from 0 to 2 additional heteroatoms as ring members selected from N, O or S, and is optionally substituted with one or two oxo; each R f  is independently selected from the group consisting of C 1-8  alkyl or heteroalkyl, C 1-8  haloalkyl, C 3-6  cycloalkyl, heterocycloalkyl, aryl and heteroaryl, and wherein the aliphatic and/or cyclic portions of R d , R e  and R f  are optionally further substituted with from one to three halogen, hydroxy, methyl, amino, alkylamino and dialkylamino groups, and optionally when two R 2  groups are on adjacent atoms, they are combined to form a five- or six-membered ring; 
 each R 3  is independently selected from the group consisting of halogen, —CN, —R i , —CO 2 R g , —CONR g R h , —C(O)R g , —C(O)R j , —OC(O)NR g R h , —NR h C(O)R g , —NR h CO 2 R i , —NR g C(O)NR g R h , —NR g R h , —OR g , —S(O) 2 NR g R h , —O—X 4 R j , —X 4 —NR g R h , —X 4 —CONR g R h , —X 4 —NR h C(O)R g , X 4 —CO 2 R g , —O—X 4 —CO 2 R g , —NH—X 4 —CO 2 R g , —X 4 —NR h CO 2 R, —O—X 4 —NR h CO 2 R i , —NHR j  and —NHCH 2 R j , wherein X 4  is a C 1-4  alkylene; each R g  and R h  is independently selected from hydrogen, C 1-8  alkyl or heteroalkyl, C 3-6  cycloalkyl and C 1-8  haloalkyl, or when attached to the same nitrogen atom can be combined with the nitrogen atom to form a four-, five- or six-membered ring having from 0 to 2 additional heteroatoms as ring members selected from N, O or S and is optionally substituted with one or two oxo; each R i  is independently selected from the group consisting of C 1-8  alkyl or heteroalkyl, C 1-8  haloalkyl, C 3-6  cycloalkyl, heterocycloalkyl, aryl and heteroaryl; and 
 each R j  is selected from the group consisting of C 3-6  cycloalkyl, imidazolyl, pyrimidinyl, pyrrolinyl, pyrrolyl, piperidinyl, morpholinyl, tetrahydrofuranyl, tetrahydropyranyl, and S,S-dioxo-tetrahydrothiopyranyl, and wherein the aliphatic and/or cyclic portions of R g , R h , R i  and are optionally further substituted with from one to three halogen, methyl, CF 3 , hydroxy, C 1-4  alkoxy, C 1-4  alkoxy-C 1-4  alkyl, —C(O)O—C 1-8  alkyl, amino, alkylamino and dialkylamino groups, and optionally when two R 3  groups are on adjacent atoms, they are combined to form a five- or six-membered ring; 
 X is hydrogen or CH 3 ; and 
 R 8  is selected from the group consisting of chloro, C 2 -C 8  alkyl, C 1 -C 8  haloalkyl, and C 1 -C 8  alkoxy; 
 R 9  is selected from the group consisting of hydrogen, halogen, C 1 -C 8  alkyl, C 1 -C 8  haloalkyl, and C 1 -C 8  alkoxy; or 
 R 8  and R 9  are combined to form a fused saturated or unsaturated mono- or multi-ring carbocycle in which one or more of the ring carbon atoms may be replaced independently from each other by N, S, or O. 
 
     
     
       2. The compound according to  claim 1 , wherein X is hydrogen. 
     
     
       3. The compound according to  claim 1 , wherein the compound has formula (XXIa) 
       
         
           
           
               
               
           
         
       
     
     
       4. The compound according to  claim 1 , wherein the compound has formula (I) or formula (XI): 
       
         
           
           
               
               
           
         
         wherein 
         R 4  is selected from the group consisting of cyano, halo, nitro, hydroxyl, (C 1 -C 6 )alkyl, (C 3 -C 6 )cycloalkyl, (C 1 -C 6 )alkyl-OH, (C 1 -C 6 )-alkyl-NR 5 R 6 , trifluoromethyl, (C 1 -C 6 )alkoxy, (C 1 -C 6 )thioalkoxy, phenoxy, COR 7 , NR 5 R 6 , NHCO(C 1 -C 6 ) alkyl, SO 3 H, SO 2 (C 1 -C 6 ) alkyl and SO 2 NR 5 R 6 ; 
         R 5  and R 6  are each independently selected from the group consisting of hydrogen, (C 1 -C 6 )alkyl and (C 3 -C 6 )cycloalkyl; 
         R 7  is independently hydroxyl, (C 1 -C 6 )alkoxy, phenoxy or —NR 5 R 6 ; 
         m is 0-4; and 
         CYCLE is a saturated or unsaturated mono- or multi-ring carbocycle in which one or more of the ring carbon atoms may be replaced independently from each other by N, S, or O. 
       
     
     
       5. The compound according to  claim 4 , wherein the compound has a formula selected from the group consisting of (II), (IIIa), (IIIb), (IIIc), and (IIId): 
       
         
           
           
               
               
           
         
       
     
     
       6. The compound according to  claim 1 , wherein C 1  is 
       
         
           
           
               
               
           
         
         wherein 
         n is an integer selected from 0, 1, 2, or 3. 
       
     
     
       7. The compound according to  claim 1 , wherein C 2  is 
       
         
           
           
               
               
           
         
         wherein 
         is an integer selected from 0, 1, 2, or 3. 
       
     
     
       8. The compound according to  claim 1 , wherein C 3  is 
       
         
           
           
               
               
           
         
         wherein 
         p is an integer selected from 0, 1, 2, or 3. 
       
     
     
       9. The compound according to  claim 1 , wherein R 8  is selected from the group consisting of chloro, C 2 -C 4  alkyl, C 1 -C 4  haloalkyl, C 1 -C 4  alkoxy. 
     
     
       10. The compound according to  claim 1 , wherein the compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
       11. A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a compound according to  claim 1 . 
     
     
       12. The compound according to  claim 4 , wherein the compound has formula (Ia) or formula (XIa): 
       
         
           
           
               
               
           
         
       
     
     
       13. The compound according to  claim 5 , wherein the compound has a formula selected from the group consisting of (IIa), (IIIe), (IIIf), (IIIg), and (IIIh): 
       
         
           
           
               
               
           
         
       
     
     
       14. The compound according to  claim 9 , wherein R 8  is selected from the group consisting of chloro, trifluoromethyl, and methoxy.